单项选择题

Tom must have practiced swimming with his father last Sunday, ______ he

A．didn't
B．hasn't
C．wasn't
D．mustn't
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单项选择题
-- Good morning, Grand Hotel. -- Hello, I'd like to book a room for the nights of the 18th and 19th. --______.
A．What can I do for you
B．Just a minute, please.
C．What's the matter
D．At your service.
单项选择题
He seems to ______ Jane. He knows her well.
A．introduce to
B．be introducing to
C．be introduced to
D．have been introduced to
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